Posted by Stan in Oly, WA on February 10, 2011 at 09:17:19 from (174.31.198.77):
In Reply to: Re: duty cycle posted by buickanddeere on February 09, 2011 at 20:16:30:
This is an area in which I’m not particularly knowledgeable so you’ll have to bear with me. For instance, I don’t know whether the term "taps" refers to the locations on the transformer where the conductors are attached, or to the conductors themselves. Anyway, won’t a given amount of current create increasing amounts of heat as the size of the conductor carrying it decreases? The arrangement inside the Lincoln buzz box is that different sized conductors carry the current from the tapped locations on the transformer to individual connections on the back of the selector switch. Turning the selector makes separate mechanical connections between each of these conductors and the work lead. If all the conductors were the same gauge of wire then the amount of heat generated by resistance would increase as increasing amounts of current were conducted from the transformer to the work lead. In that case, the duty cycle would increase as the current decreased. But with the conductors increasing in size from the lowest tapped current to the highest, couldn’t the heat generated by resistance stay relatively consistent over the whole range? This would then hold the duty cycle constant at all settings.
If this is incorrect, please explain to me what I am misunderstanding.
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